tester emf arduino

#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
const int backlight = 10;
#define sample 300
int inPin = 5;
float val;
int pin11 = 13;
int array1[sample];
unsigned long averaging;

void setup() {
  pinMode(backlight, OUTPUT);
  digitalWrite(backlight, HIGH);
  lcd.begin(16,2);
  lcd.print("EMF Tester");
  lcd.setCursor(0,1); //Va alla riga 1
}

void loop() {
for(int i = 0; i < sample; i++){
   array1[i] = analogRead(inPin);
   averaging += array1[i];
}

val = averaging / sample;
val = constrain(val, 0, 100);
    val = map(val, 0, 100, 0, 255);
    analogWrite(pin11, val);
    averaging = 0;
   lcd.setCursor(0,1);
   lcd.print(val);
   lcd.print("     ");
}